Table 3 Main parameters of two TBM cutterheads
From: A New System to Evaluate Comprehensive Performance of Hard-Rock Tunnel Boring Machine Cutterheads
TBM cutterhead | Center cutter radius (mm) | Normal and gauge cutter radius (mm) | Blade width (mm) | Included angle θ | Cutterhead diameter (mm) | Cutter spacing (mm) | Migmatite penetration (mm) | Granite penetration (mm) |
|---|---|---|---|---|---|---|---|---|
Robbins | 195 | 216 | 19.25 | 20 | 8.53 | 90 | 6.92 | 4.46 |
CRCC | 195 | 216 | 19.25 | 20 | 7.8 | 83 | 6.92 | 4.46 |